Etiologic considerations based on the epidemiology of multiple sclerosis.
D000328:Adult; D000349:Africa; D000367:Age Factors; D001208:Asia; D002980:Climate; D003469:Culture; D004641:Emigration and Immigration; D004777:Environment; D005006:Ethnicity; D005060:Europe; D005260:Female; D005843:Geography; D006801:Humans; D006968:Hypersensitivity, Delayed; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000209:etiology* / Q000235:genetics / Q000401:mortality; D009656:North America; D012737:Sex Factors; D014777:Virus Diseases